effectiveness of solar & wind - Page 130 - SailNet Community

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post #1291 of 1303 Old 07-01-2009
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It appears we both need out copy of GEB. Anyway you are right that assuming that the sentence is false does not lead to a contradiction, but that was never the issue, it is the undecidability that is the issue and that remains, for both assumptions.

I just wanted to share the train of thoughts that wind-magic's story about DNA inspired in me. Namely the tendency many people have to wander about questions that cannot be solved. Now is that a property of the world or a property of our logic?

Use your head, ram the wall till it falls.
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post #1292 of 1303 Old 07-01-2009
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this discussion is the kind that persuade a lot of Philosophers that they really were (!!!!) in favor of Quantum Mechanics all along.

--jerry
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post #1293 of 1303 Old 07-01-2009
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It's not that a statement is TRUE - or that a statement that it is False... It is JUST that you have made the decision to limit the choices to those two items - and therefore exclude other possibilities.

Clearly, were I to be asked about my wife's current new "hair color", I would opt to quickly come up with another solution to this kind of question...

--jr
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post #1294 of 1303 Old 08-22-2009
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With good insulation on the frig. I could shut it off at night & still have frozen cubes in the morning! By rigging solar panels to have sun at nearly 90 degrees to incident sun you can "squeeze" 15-18% more amps in early/late parts of the day. The FourWinds didn't help as much as I'd hoped but every little bit helps.
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post #1295 of 1303 Old 08-22-2009
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Quote:
Originally Posted by tjaldur View Post
It appears we both need out copy of GEB. Anyway you are right that assuming that the sentence is false does not lead to a contradiction, but that was never the issue, it is the undecidability that is the issue and that remains, for both assumptions.

I just wanted to share the train of thoughts that wind-magic's story about DNA inspired in me. Namely the tendency many people have to wander about questions that cannot be solved. Now is that a property of the world or a property of our logic?
Ahh - yes. It's always both true and false. Verschränkung...that crazy cat of Schrödinger's.

S/V Dawn Treader - 1989 Hunter Legend 40
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post #1296 of 1303 Old 12-29-2015
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Re: effectiveness of solar & wind

Wow

Stephen
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"It isn't that life ashore is distasteful to me. But life at sea is better."
-Sir Francis Drake
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post #1297 of 1303 Old 12-29-2015
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Re: effectiveness of solar & wind

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Originally Posted by xort View Post
I received this comment recently on a mailing list...

"Our experience over the years in the Caribbean is that solar panels work but only on boats which have minimal electrical requirements. Even the sailboats are running their engines to keep the refrigeration and freezer going once or twice a day. We had solar & wind on our sailboats so we do have lots of first hand experience with both.

We encounter sailboats with 4-6 panels and two wind generators who still run the diesel daily. That's a lot of space devoted to panels and a lot of noise 24/7 from the props."

So I'm looking for some real world experience with powering a boat's systems with solar & wind.

I'm planning on a little over 100 amps per day and was expecting to get most of that from 2 large panels and a wind gen. Not practical?
I have not read the complete list of responses, but have read donw the list far enough that it sparked my fire..

anything written can be skewed in whatever direction the author wants to lead you.... so reading one paragraph wont give you anymore information than is necessary to start/keep a rumor going.

IF there is problem with solar panels, its only in the way they are rated... the largest percentage of the people who consider them, take the numbers as advertised on the panels, and try to make it work for their needs without anymore education. they seem to believe their schooling is closed and they go forth with their idea... and as much as we try to give them what they will need, they listen to people who DO NOT UNDERSTAND the systems any better than they themselves do, and so they go forth with what they want to believe and continue to install 1 or 2 small panels that have barely enough power to supply the needs in the best circumstances, and NOTHING left over for when a bit more power needs to be used, or for future needs. (and then bad mouth the system for not being adequate)

these people who have no idea how panels are rated, or what the rating means (and there is a LOT more of this type around than one wants to believe), they ignorantly claim big panels are overkill, and god forbid that someone should spend a couple hundred dollars more for an overkill of charging capability.
but there may be some validity in what they claim if you dont have a big enough battery bank to make use of the capability.. one has to remember the bank IS part of the system and has to be sized accordingly.

solar is absolutely a great source of power, and the available output it only limited to the space one has to install more panels... but it must be understand that some people's power requirements on their boat (or elsewhere) are completely unreasonable because they feel no need to conserve. these people will not be happy with solar, and will be on the side of the naysayers..

(2) 140-160watt panels will easily supply the needs of most medium sized NON-luxury boats with a refridgerator where ever there is daylight for at least 6 hours a day...

this is NOT true of boats that have washers/dryers, satellite tvs , A/C units and other assorted unnecessary power consuming items, that are considered luxury items by most of us...

when a solar set up is properly sized and installed on a boat (or anywhere else), it is almost always maintenance and trouble free for many many years... there is no other system on the boat that will work every single day and be as dependable for so many years without touching it, or that will give back as much, as what the power producing solar panels will.

a properly installed solar charging system should last 20+ years if the batteries are maintained properly.... and replaced as needed, which will be less often than with any other charging system.

Last edited by centerline; 12-30-2015 at 02:39 PM.
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post #1298 of 1303 Old 12-29-2015
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We encounter sailboats with 4-6 panels and two wind generators who still run the diesel daily. That's a lot of space devoted to panels and a lot of noise 24/7 from the props."
What utter rot.

Pity its still not 2009 where I could have s good go st that drivel!
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post #1299 of 1303 Old 12-29-2015
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Re: effectiveness of solar & wind

1

No wife, no kids, no debt.

Last edited by sharkbait; 02-01-2016 at 07:00 PM.
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post #1300 of 1303 Old 12-29-2015
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Re: effectiveness of solar & wind

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Originally Posted by stpabr View Post
Wow
waited 6 years for that
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